Ride all day and night without changing sunglasses with Biker Armour Photochromic Motorcycle Sunglasses.   Photochromic lenses change from clear to dark smoke in less than 20 seconds when exposed to sunlight.  Lenses are constructed of impact resistant polycarbonate tp protect your eyes from harmful projectiles.   Also equipped with a foam cushion gasket to block wind, dust and debris so you can ride without squinting or tearing.  Eyewear available with BikerArmour Photochromic Lenses or genuine Transitions ® XTRActive™lenses.  FITS MEDIUM TO XLARGE HEADS.